CAJ | 학술논문

以WC/HZSM-5为前驱体制备了一系列不同Zn含量的Zn-WC/HZSM-5催化剂，采用X射线衍射、扫描电子显微镜、N2物理吸附、傅里叶变换红外光谱和热重分析等手段对 Zn-WC/HZSM-5的晶相、形貌、比表面积、酸性质、积炭量等进行了表征，并研究了正己烷芳构化的催化性能，探究了助剂Zn与WC在反应过程中的作用。结果表明，Zn的引入可以提高催化剂的芳烃选择性和芳烃收率。当Zn负载量为1.5%（质量分数）时，所制备的Zn-WC/HZSM-5催化剂芳构化活性最佳，芳烃收率达到36.18%。Zn的引入不仅改变了WC/HZSM-5表面的酸性分布，而且可以减少WC/HZSM-5催化剂的积炭量。
이WC/HZSM-5위전구체제비료일계렬불동Zn함량적Zn-WC/HZSM-5최화제，채용X사선연사、소묘전자현미경、N2물리흡부、부리협변환홍외광보화열중분석등수단대 Zn-WC/HZSM-5적정상、형모、비표면적、산성질、적탄량등진행료표정，병연구료정기완방구화적최화성능，탐구료조제Zn여WC재반응과정중적작용。결과표명，Zn적인입가이제고최화제적방경선택성화방경수솔。당Zn부재량위1.5%（질량분수）시，소제비적Zn-WC/HZSM-5최화제방구화활성최가，방경수솔체도36.18%。Zn적인입불부개변료WC/HZSM-5표면적산성분포，이차가이감소WC/HZSM-5최화제적적탄량。
A series of Zn-WC/HZSM-5 catalysts with different amounts of Zn additive were prepared based on the precursor WC/HZSM-5. The samples were characterized with X-ray diffraction, scanning electron microscopy, N2 adsorption-desorption, Fourier transform infrared spectroscopy and thermogravimetric analyzer. Aromatization of n-hexane was evaluated over the Zn-WC/HZSM-5 catalysts in a fixed-bed micro reactor. The role of metal components and the reaction mechanism were studied. Both aromatic selectivity and yield increased with Zn-WC/HZSM-5. Yield increased to 36.18% when the Zn-WC/HZSM-5 displayed the best activity with the concentration of Zn 1.5%(mass). Introduction of Zn into WC/HZSM-5 led to redistribution of acid sites on the surface of catalyst and also caused decrease of coke deposition.